01490/01491 had the experimental fibreglass ends because Pullman-Standard wanted to test this material out before using it for an order of Chicago elevated cars, and the MTA agreed. The rest of the 01400's had the same steel ends as the 01100's on the Main Line Elevated and the St. Louis-built 0500's on the East Boston-Revere line, not to mention thousands of New York City subway cars of similar design.